Snow Leopard and heat on the MBA - Post your anecdotes here

So far I've been hearing only sparse and now conflicting reports about heat produced by MBA with Snow Leopard. Initially the reports were mainly that less heat was produced, but I'm now seeing one or two posts that it's made their MBA/MBP hotter.

So far I've been hearing only sparse and now conflicting reports about heat produced by MBA with Snow Leopard. Initially the reports were mainly that less heat was produced, but I'm now seeing one or two posts that it's made their MBA/MBP hotter.

I just bought and installed SL on my rev. A 1.8 64GB ssd MBA that I purchased only 3 days ago for a bargain. The MBA ran pretty cool on 10.5.8 and the fan didn't spin up when no app was launched or even when only Safari was launched. But now with 10.6 the fan is almost always on under the aforementioned circumstances. One moment the fan isn't audible and the next moment it's at its max, then may slow down a bit to continue at half speed.

I installed the SL version of CoolBook and set it to 800Mhz@.900V and 1.6Ghz@0.900V (thus crippling the 1.8Ghz for the sake of a possibly cooler cpu and a more quiet MBA) when connected to AC, but it seems to make no difference. I will end up with 10.5.8 again if I can't fix this during the coming weekend, as 10.6 brings nothing that I really anticipate for my MBA.

Anyone's machine staying at 6200 RPM even on idle? (Assuming no coolbook or tweak). I've been plagued by that issue for a while. And for those upgrading from 10.5.8 to 10.6 be aware that your iPhone may not show up in iTunes.

Anyone's machine staying at 6200 RPM even on idle? (Assuming no coolbook or tweak). I've been plagued by that issue for a while. And for those upgrading from 10.5.8 to 10.6 be aware that your iPhone may not show up in iTunes.

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I am on the extreme opposite
Earlier on, the machine has heated up to 79C as the result of acrobat error and some looping occured
it was to my dismay that the revs never have spin up until I use smcFanCtrol to force it spinning at 6000rpm

My Rev.A went quite nuts upon initial install, but it turned out to be Spotlight running it's index. As soon as it finished, it's running cooler, faster, ad the fan seems to be idling more. Of course, I lost iStat Menus, so the numbers not being easily visible might be swaying my opinion.

Did anybody else notice the strange throttle behavior of the SL version of CoolBook? I noticed that it went back and forth to lots of frequencies that I hadn't set in CoolBook, as if the OS X throttle settings were still active and not 'overruled' by those of CoolBook.

I installed Snow Leopard (SL) on My MacBook Pro 13" / 2.53 Ghz / 4GB mem, and noticed that the temperatures are much lower. My app that I use to monitor the temp use to show about 170 degrees all the time and the fan would reach around 4k. After installing SL the temp is consistent around 108 - 110 degrees and the fan is averaging about 2,750 rpm. Now it is comfortable to have my mac on my lap! Really like the changes from SL. I also run Parallels using Windows XP and have same great results - runs cooler!

I thought my MBA Rev A was running much hotter now that I upgraded to Snow Leopard so I did a little test. I disabled Spotlight on my drive, turned off every application and left the unit running for two hours, lid open.

When I came back, smcFanControl was reporting 158 F with a fan speed of 6192 rpm.

In fact, just typing this post - with Mail open - has caused the temp to rise to 153 F @ 5855 rpm.

I just finished installing SL on my MBA Rev. 2 1.86 SSD. I had about 5 minutes or less of the fan speed maxing, but then it settled back down to where it had been before. It's running cool and quiet now.

Ok, now this makes me a little nervous about upgrading when I get my disk tomorrow hopefully (if USPS is on my side, Amazon estimate said already today...)
I have a rev B with SSD and it is growing on me except the temp, although not too bad I dont want it to be any hotter and it seems most rev B owners report higher temps after SL.

With general use (the only programs open are Firefox, Transmission, iTunes), I have found my MBA Rev B is running a few degrees cooler, and the fan is changing speed more frequently.

On a cold start in 10.5.8, the CPU would hit 61-63 deg C once I cranked up Transmission. Now it's more like 56-59 deg C. Before, the fan would jump between ~3k and ~6k, but now it goes up and down in the ~3k-4.5k region. This points to more sensible and active temperature control in SL, IMO.

I installed SL on my revA Macbook Air. As soon as I started using it I noticed the fans spinning up to 6200 and CPU temp up to 80 degrees C. Activity monitor revealed mds and java were both going crazy. After some trial and error I was able to figure out that Crashplan might be the culprit. I downloaded the installer from their website and ran the uninstall routine which instantly fixed the problem! I like Crashplan and have a paid subscription so I will install the latest version which I am told is okay. Might wait a few days though.

Going on Day 2 (shutdown overnight), I had Safari open and was changing mass permissions on an external drive, and the fans kicked in. When that finished, I noticed everything cooling down, the fans started to slow, but then they kicked back into full blast again.

I'm not sure what the issue is, I've never had heat issues, or ever heard the fans kick in unless I was doing some heavy disk activity. Certainly never with just Safari open.

This is a Rev A 1.8 ssd version.

I may upgrade to the latest flash version, and see if that was the issue.

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